<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="../js/jquery-3.4.1.min.js"></script>
		
	</head>
	<body>
		<script>
			//onload的函数
			jQuery(function(){
				alert("welcome to jquery world");
			});
			$(function(){
				alert("welcome again");
			});
		</script>
	</body>
</html>
